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Natural lignan compound with high weeding activity and application thereof

A technology of lignans and compounds, which is applied in the field of pesticides, can solve the problems of decreased effects of various herbicides and phytotoxicity of next crops, and achieves efficient inhibition of seed germination and growth, significant theoretical guidance, and good application prospects Effect

Active Publication Date: 2019-01-18
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, large-scale and high-dose use throughout the year also leads to the emergence of weed resistance, which reduces the effect of various herbicides, and residues in the soil cause phytotoxicity of the next crops from time to time.

Method used

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  • Natural lignan compound with high weeding activity and application thereof
  • Natural lignan compound with high weeding activity and application thereof
  • Natural lignan compound with high weeding activity and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation of embodiment 1 compound TSC-3

[0036] The stem bark of Pine fir is extracted with methanol, and concentrated to obtain methanol extract. After the extract is dissolved with a small amount of methanol, 1 to 2 times the volume of water is added to shake it evenly, suspended, and then extracted with petroleum ether and ethyl acetate in sequence to obtain the ethyl acetate extract.

[0037] The ethyl acetate extract was first subjected to silica gel column chromatography with chloroform / methanol system, and then combined by TLC for activity determination. The active part was subjected to silica gel column chromatography with petroleum ether / acetone and petroleum ether / ethyl acetate in sequence, and separated by Sephadex gel. After separation, it was combined by TLC spot plate, and then separated by reverse phase silica gel column chromatography Compound TSC-3 is obtained.

[0038] The substance is a colorless oily viscous liquid, the compound 1 H-NMR, ...

Embodiment 2

[0039] Example 2 Herbicidal activity of compound TSC-3 on invasive weed Mikania micrantha

[0040] The herbicidal activity of the compound TSC-3 on the invasive weed Mikania micrantha was determined by the small cup method. See Table 1 for the inhibitory effect on root length and fresh weight of Mikania micrantha 7 days after treatment.

[0041] Table 1 Herbicidal activity of compound TSC-3 on the invasive weed Mikania micrantha (7d)

[0042]

[0043] The results showed that the herbicidal activity of compound TSC-3 to Mikania micrantha (inhibitory middle concentration IC of root length and fresh weight 50 Comparison) was significantly higher than the control drug glyphosate.

Embodiment 3

[0044] Example 3 The herbicidal activity of the compound TSC-3 to the invasive weeds Sacred thistle

[0045] By the small cup method, the herbicidal activity of the compound TSC-3 on the red thistle was determined. 7 days after treatment, the inhibitory effect on the root length and fresh weight of thistle is shown in Table 2.

[0046] The herbicidal activity (7d) of compound TSC-3 of table 2 to the invasive weeds of the red thistle

[0047]

[0048] The results in table 2 show that the herbicidal activity of compound TSC-3 to Mikania micrantha (inhibition medium concentration IC of fresh weight 50 Comparison) was significantly higher than the control drug glyphosate. Herbicidal activity of TSC-3 to Mikania micrantha (inhibition of root length IC 50 Comparison) is equivalent to or even slightly superior to the control drug glyphosate.

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Abstract

The invention discloses a natural lignan compound (TSC-3) with high weeding activity and application thereof. The natural lignan compound (TSC-3) has the advantages that the obvious weeding function is realized on multiple types of weeds, especially invasive weeds which are difficult to prevent and control, the germinating and growth of the weeds can be inhibited at high efficiency, and the effectof the natural lignan compound is better than the effect of commercialized herbicides, such as glyphosate and treflan; the significant theoretical guidance significance and practical popularization value of the compound (TSC-3) are realized on the research of novel plant-derived herbicides and the research, development and innovation of novel herbicides; the natural lignan compound (TSC-3) is derived from the plants, the smooth degrading path exists in the nature, and the low-toxin and environment-friendly effects are realized; the compound can be extracted from a taiwania flousiana plant, and can be artificially synthesized, so that the compound is suitable for large-batch production and has a good industrialized application prospect. The invention also discloses a preparation method ofthe natural lignan compound (TSC-3) so as to lay a good foundation for the further development of novel herbicides and the deep study of the functions of the compound.

Description

technical field [0001] The invention belongs to the technical field of pesticides, and more specifically relates to a natural lignan compound with high herbicidal activity and application thereof. Background technique [0002] There are many kinds of weeds, with a large area and high frequency of occurrence. They often compete with crops or other beneficial plants for water, money, and growth space, causing crop yield reduction or destroying the ecological balance of plants. Therefore, weed control is very necessary. [0003] The main means of controlling weeds now is to use chemical herbicides, which play an important role in controlling weeds. However, the large-scale and high-dose use throughout the year also leads to the emergence of weed resistance, thereby reducing the effect of various herbicides, and residues in the soil cause phytotoxicity of the next crop from time to time. In this context, the research and development of new chemical components with herbicidal e...

Claims

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Application Information

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IPC IPC(8): C07H17/04C07H1/08A01N43/16A01P13/00
CPCA01N43/16C07H1/08C07H17/04
Inventor 周利娟黄继光
Owner SOUTH CHINA AGRI UNIV
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